Vertical scroll position resets when servor triggers reloading in Firefox

[T1mL3arn]

This is probably firefox issue (or even just me). But maybe is it related to servor configuration?

1. Serve some page with servor --reload, open it in FF
2. Scroll the page vertically
3. Trigger a reload with style changing
4. Page reloads but the scroll position is reset

Additional info:

Firefox 89.0.1, Win 8.1
Tested in Chromium 88.0.4324.150 and there is no problem. There is also no problem in Firefox if I run servor without --reload flag and do reload with F5.