Hitting Assert in maintenance daemon when creating a second database

When locally running tests with asserts enabled I am hitting an Assert sometimes in the multi_extension test when creating a second database:

https://github.com/citusdata/citus/blob/a209999618ed0a143561767e6240e0a365e6ec6b/src/test/regress/sql/multi_extension.sql#L375

The assert I'm hitting is https://github.com/citusdata/citus/blob/a209999618ed0a143561767e6240e0a365e6ec6b/src/backend/distributed/utils/maintenanced.c#L808

Some more investigation is needed to know if this is an actual bug, or only a faulty assert.

Reproduce the assertion with asserts enabled by running the multi_extension test at src/test/regress/sql/multi_extension.sql, especially around line 375. Then inspect the maintenance-daemon assertion in src/backend/distributed/utils/maintenanced.c around line 808 and determine whether it indicates a real bug or a faulty assertion; completion requires a confirmed diagnosis.

Written by the indexing model from the issue text.