Studio 2021 - the text marker sometimes disappears

Hi,

When I move from one segment to the next in Studio 2021 the text marker sometimes disappears, often at the beginning of a segment. I have to guess where it is. It does not happen all the time, so I find it hard to give any clues as to how it occurs. Has anyone else noticed this? It is very annoying and I hope it can be fixed soon.

Thanks, Eva