"Mark as read while scrolling" not working for specific scenario

I guess this seems to be a bug rather than intended (let me know otherwise):

News list is empty. When new items are synced automatically, and the number of items fits onto the screen (no scrolling possible), then it's also not possible to mark them all as read with swiping up.

However, if syncing is triggered manually (swipe down), the swipe up works as expected (all get marked as read).

Configuration, see below.

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App Version: 0.9.9.94
App Version Code: 195

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SSO enabled: true

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OS Version: 5.4.302-moto-g9f94607f9202(218d63f788)
OS API Level: 36
Device: berlin
Model (and Product): motorola edge 20 (berlin_retail)

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cb_detailed_view_zoom=true
sp_max_cache_size=500
sp_swipe_left_action=2
sw_use_single_sign_on=true
cb_ShowOnlyUnread=true
cb_openInBrowserDirectly=true
cb_prefBackButtonOpensDrawer=false
lv_cacheImagesOffline=0
cb_ShowFastActions=false
pref_sync_settings=5
cb_AutoSyncOnStart=true
sp_news_detail_actionbar_icons=[]
sp_swipe_right_action=1
cb_NavigateWithVolumeButtons=false
sp_font_size=1.0
NewsWebVersionNumber=27.2.0
sp_search_in=2
cb_external_player=false
cb_SyncWhenScrolledToBottom=false
sp_sort_order=1
cb_MarkAsReadWhileScrolling=true
sp_feed_list_layout=5
cb_oled_mode=false
PREVIOUS_VERSION_CODE=195
sp_display_browser=1
sp_app_theme=0