Hi, upon closer inspection we found a problem with the patch "btrfs: Honour FITRIM range constraints during free space trim" that has been merged to 5.1.4. This could happen with ranged FITRIM where the range is not 'honoured' as it was supposed to. Please revert it and push in the next stable release so the buggy version is not in the wild for too long. Affected trees: 5.0.18 5.1.4 4.9.179 4.19.45 4.14.122 Master branch will have the revert too. Thanks.