# 4.1 Kit - issues after firmware upgrade **URL:** \ **Category:** Troubleshooting\ **Tags:** groundcontrol\ **Created:** [May 17, 2025, 6:35pm UTC](https://forums.maslowcnc.com/t/4-1-kit-issues-after-firmware-upgrade/24130 "2025-05-17T18:35:32Z")\ **Posts on this page:** 1\ **Showing post:** 4
**Author:** ![bar](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/bar/32/10_2.png) [@bar](https://forums.maslowcnc.com/u/bar)\ **Post date:** [May 19, 2025, 5:23pm UTC](https://forums.maslowcnc.com/t/4-1-kit-issues-after-firmware-upgrade/24130/4 "2025-05-19T17:23:08Z")
> [@DKP](#): > > And ended up with Maslow.yaml.yaml or other strange file names like OK or cancel… This sounds like this bug to me! > [@FluidNC from 1.05 renaming bug on Android Chrome](https://forums.maslowcnc.com/t/fluidnc-from-1-05-renaming-bug-on-android-chrome/24122): > > Quite amusing (because I was able to work around it) bug. I’ve not fully checked I can repro from a fresh flash but I believe all I did was: Full Flash 1.05 from Windows on top of a fresh from factory 4.1 board. Try config and have it fail (don’t think it’s related). Power cycle Attempt to rename / modify files on Android 12 running Chrome 136..0.7103.87 connecting via Maslow-self-hotspot. Soooooo when I did this, if I tried to rename a file (ie maslow.yaml → maslow\_bak.yaml), it instead ren… @md8n Do you have any insights on what might be going on there? --- _[View the full topic](https://forums.maslowcnc.com/t/4-1-kit-issues-after-firmware-upgrade/24130)._