Hi Stanislava,
Thanks for providing us the video and the sample file.
Based on the test by our side, with the same version 1811 (11029.20079), we can’t reproduce the issue with the sample file you provided. At least, it seems the issue is not related to the file itself. In the meantime, that means the issue may not be related
to the Project app version because it can’t be reproduced in the same version.
To further investigate, please tell us the information below:
1.
When did the issue first occurred? Was there anything changed? For example, anything installed or updated?
2.
To check whether the issue is related to this specific computer environment, is it convenient for you to try on another computer to see the result?
In the meantime, to check whether the issue is related to the app itself, please check whether
run Office online repair
can fix the issue.
Thanks,
Rena