what OS is it, are there any specific steps that lead to the issue? what do your settings fro editor tabs (Settings | Editor | General | Editor Tabs) look like? Please share a screenshot of this page and your idea.log (Help > Show Log in ...)
Still no luck in reproducing the issue... does it help if you disable all custom plugins (Atom Material Icons, Rainbow Brackets, Emmet Everywhere) and re-start the IDE?
If the problem persists, could you share your settings (File > Manage IDE Settings > Export settings)? Also, does re-settings all preferences to default (File > Manage IDE Settings > Restore Default settings...) make things any better?
Disabling the Athom Matherial Icons plugin doesn't help
what OS is it, are there any specific steps that lead to the issue? what do your settings fro editor tabs (Settings | Editor | General | Editor Tabs) look like? Please share a screenshot of this page and your idea.log (Help > Show Log in ...)
No specific steps. I just update the webstrom version and open project. How I can attach a log file? It's too large for screenshot

macOS Mojave v10.14.6
is it the only project you have opened? What view mode do you use (full screen, distraction free, etc)?
Please upload the log files to some file server and provide a link here
Yes. it is the only project. fullscreen
https://gist.github.com/Zveroboev/87dab56d67eff767fd715eccc4313346
Nothing suspicious in the log
Please open View > Appearance submenu and attach a take a screenshot of it
Try playing with your settings - does the issue go away if you enable Navigation bar, exit full screen, etc?
Toolbar and Navigation bar can fix it. Exit from full screen too.
... but tabs in navigation bar don't display too.
Still no luck in reproducing the issue... does it help if you disable all custom plugins (Atom Material Icons, Rainbow Brackets, Emmet Everywhere) and re-start the IDE?
If the problem persists, could you share your settings (File > Manage IDE Settings > Export settings)? Also, does re-settings all preferences to default (File > Manage IDE Settings > Restore Default settings...) make things any better?