Rotating screen while "Your Mailbox has been unlinked" dialogue box is displayed causes blank screen

Steps to reproduce:

I used the Xiaomi MI11 Lite 5G device, and the Pixel 2 and was able to reproduce on both

• I link the Briar app on either device with a mailbox on another device
• Then I unlink the mailbox using the mailbox device, so that the Briar app is unable to reach it.
• Then I tap Unlink on the bottom of the mailbox status screen in the Briar app
• unlinking seems to run OK, and there is the progress wheel, and after that there is the dialogue box "Your mailbox has been unlinked.. Next time you have access to yoru ailbox device, please open the Mailbox app and tap the Unlink button to complete the process..." The only option a user has on this dialogue is to tap Got it.
• But if the screen is rotate at this point, BEFORE taping the Got it, then what we see if this:

Having problems wiht Android Studio which currently get frozen if i try to take a screenshot - so here's the photo of the screen taken with another phone. If I tap the Back arrow in the top left corner of this blankscreen, then what I see is the mailbox status screen again.... Whereas the unlinking has been already done, so this screen should not be disaplyed again.

If I go back from that screen, I see Briar settings screen, and if I go into mailbox option, I see that the mailbox linking can be done again.
This happens both with do-not-keep-acitivities on and off