EBPocket Pro 2.45, iPad mini, no "search" button in "fullscreen mode"

Hello, hishida! Thank you for your work!
I have a bug report:

In app version for iPad, there is no button that shows a search panel, if you set a "fullscreen mode" (全画面モード).
Screenshot: hhttps://i.ibb.co/q7whLbW/IMG-E0001-e.jpg

This bug appears only on first fresh launch of the app (after device reboot or closing the app completely). Then, if you minimize the app and show it again, "search" button will come out and works fine.
Screenshot: hhttps://i.ibb.co/f2CGpJP/IMG-E0002-e.jpg

Tested on:
EBPocket Pro 2.43(-45)
iPad mini 5, 13.5.1