Hello, just for the record. Upstream seems to have fixed this in [1] which is included in kernel v5.8 and later.
Kind regards, Bernhard [1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/tools/perf/ui/browsers/hists.c?id=d61cbb859b45fdb6b4997f2d51834fae41af0e94
