Regression: not possible to compare document or insert media file

Steps:

• Open an impress file
• Select: Insert > Media > Audio or Video

• Open a text document
• Review tab
• Compare document...

Result:

Logs

Interesting to see

[viewer] Received post message UI_InsertFile {callback: 'Action_CompareDocuments', mimeTypeFilter: Array(4)} false
global.js:818 IdleHandler: _deactivate()
global.js:818 IdleHandler: _activate()
dav.ts:84 SyntaxError: "undefined" is not valid JSON
    at JSON.parse (<anonymous>)
    at Object.<anonymous> (FilesAppIntegration.js:178:41)
    at FilePicker.vue:276:43
    at Array.filter (<anonymous>)
    at o.<anonymous> (FilePicker.vue:276:23)
    at e.get (vue.runtime.esm.js:3462:33)
    at e.evaluate (vue.runtime.esm.js:3563:27)
    at get value (vue.runtime.esm.js:1401:29)
    at Object.get [as filteredFiles] (vue.runtime.esm.js:1214:28)
    at o.je (FilePicker.vue:320:2)

in

global.js:818 CSC: set inRedrawCallback = true
global.js:818 CSC: set inRedrawCallback = false
global.js:818 1783432875121 OUTGOING: mouse type=move x=11405 y=807 count=1 buttons=0 modifier=0 
global.js:818 1783432875127 INCOMING: mousepointer: text 
global.js:818 IdleHandler: _activate()
global.js:818 JSDialog: full dialog "review-compare-dropdown"
global.js:818 JSDialog: put items inside container for "review-compare-dropdown"
global.js:818 Dropdown: potential unhandled action: "selected"
global.js:818 JSDialog: close "review-compare-dropdown"
Office.vue:404 [viewer] Received post message UI_InsertFile {callback: 'Action_CompareDocuments', mimeTypeFilter: Array(4)} false
global.js:818 IdleHandler: _deactivate()
global.js:818 IdleHandler: _activate()
dav.ts:84 SyntaxError: "undefined" is not valid JSON
    at JSON.parse (<anonymous>)
    at Object.<anonymous> (FilesAppIntegration.js:178:41)
    at FilePicker.vue:276:43
    at Array.filter (<anonymous>)
    at o.<anonymous> (FilePicker.vue:276:23)
    at e.get (vue.runtime.esm.js:3462:33)
    at e.evaluate (vue.runtime.esm.js:3563:27)
    at get value (vue.runtime.esm.js:1401:29)
    at Object.get [as filteredFiles] (vue.runtime.esm.js:1214:28)
    at o.je (FilePicker.vue:320:2)
logError @ vue.runtime.esm.js:3065
globalHandleError @ vue.runtime.esm.js:3057
handleError @ vue.runtime.esm.js:3024
(anonymous) @ vue.runtime.esm.js:2703
(anonymous) @ vue.runtime.esm.js:3891
(anonymous) @ vue.runtime.esm.js:3462
(anonymous) @ vue.runtime.esm.js:3538
flushSchedulerQueue @ vue.runtime.esm.js:4141
(anonymous) @ vue.runtime.esm.js:3159
flushCallbacks @ vue.runtime.esm.js:3081
Promise.then
(anonymous) @ vue.runtime.esm.js:3106
nextTick @ vue.runtime.esm.js:3171
queueWatcher @ vue.runtime.esm.js:4227
(anonymous) @ vue.runtime.esm.js:3529
(anonymous) @ vue.runtime.esm.js:732
set @ vue.runtime.esm.js:976
loadDAVFiles @ dav.ts:84
await in loadDAVFiles
(anonymous) @ FilePicker.vue:254
invokeWithErrorHandling @ vue.runtime.esm.js:3033
callHook$1 @ vue.runtime.esm.js:4048
insert @ vue.runtime.esm.js:4443
invokeInsertHook @ vue.runtime.esm.js:6966
(anonymous) @ vue.runtime.esm.js:7180
(anonymous) @ vue.runtime.esm.js:3781
(anonymous) @ vue.runtime.esm.js:3891
(anonymous) @ vue.runtime.esm.js:3462
Watcher @ vue.runtime.esm.js:3452
(anonymous) @ vue.runtime.esm.js:3908
(anonymous) @ vue.runtime.esm.js:8797
(anonymous) @ vue.runtime.esm.js:5724
Vue @ vue.runtime.esm.js:5785
spawnDialog @ dialog.mjs:14
(anonymous) @ filepicker-builder.ts:77
pickNodes @ filepicker-builder.ts:76
await in pickNodes
pick @ filepicker-builder.ts:105
insertFile_impl @ FilesAppIntegration.js:191
insertFile @ FilesAppIntegration.js:201
postMessageHandler @ Office.vue:492
(anonymous) @ postMessage.tsx:74
(anonymous) @ postMessage.tsx:68
(anonymous) @ postMessage.tsx:12
postMessage
_postMessage @ Map.WOPI.js:1160
fire @ Events.ts:280
fire @ Events.js:25
(anonymous) @ docdispatcher.ts:161
dispatch @ docdispatcher.ts:1274
(anonymous) @ Widget.MenuButton.js:114
(anonymous) @ Util.Dropdown.ts:298
(anonymous) @ Widget.Combobox.js:85
global.js:818 IdleHandler: _deactivate()

Reproduce both Insert > Media and Review > Compare document flows, then start at FilesAppIntegration.js:178 and dav.ts:84, where the undefined JSON.parse error is reported. Trace the file-picker data through FilePicker.vue:276 and filepicker-builder.ts; done means both dialogs open and allow the expected file selection without the parsing error.