I just found out that Telegram may not be safe for Ukrainians to use. Maybe this is old news, but it was a surprise to me, and I think it is important to spread the word that Telegram should be avoided for communication you would not want to fall into enemy hands.
Since this article is dated Feb 25, this may indeed be very old news to most Ukrainians. However, this is a stressful time and maybe someone reading this didn't yet get the memo.
You might be right. And during war time I used not to write in a messenger things that cannot be found in an open sources.