locked Callsigns window disappears and reappears after a while

Robert, SP8SN

I have installed the new version 2.50. Everything works OK but there is a problem with the "callsigns" window. It displays the decoded characters and disappears after a few dozen seconds, reappears by itself after a few seconds. I have two programs running for two transcivers. It is the same in both. What's the problem. I reinstalled 2.16 and it's ok.
Robert, SP8SN

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