One other Lemmy instance is on 0.19.4, and that also has the same problem:

Ungoogled Chromium: the create post form erases the fields after tabbing out of them. Tor Browser (firefox based): no issues with the create post form.

Now slrpnk is on 0.19.5, along with two other Lemmy nodes I tested this on. The create post form is working in this version with Ungoogled Chromium.

timeline selector broken

There is another problem that was introduced with version 0.19.4 and still persists in 0.19.5: There are four possible timeline views: subscribed, local, all, moderator view. That selector is broken in Ungoogled Chromium 112 but not in Firefox-based browsers. In UC, I click “moderator view” and the button highlights as I click it, the page refreshes, but the selector does not stick. It is trapped in the “local” view and only shows the local timeline.

This problem is replicated in other 0.19.4 and 0.19.5 instances.

update

Actually there is still a problem with 0.19.4 w.r.t. post creation. And this affects Firefox too: if I use the cross-post feature to copy the post elsewhere, the form is populated just fine but then I have to search for the target community at the bottom of the form. As soon as I select the target community, the whole rest of the form clears. I have not yet tested this specific scenario in 0.19.5.