Steps to reproduce:

1. LLD creates a logrt item with a regexp matching only one rotated log file (screenshot 2)
2. Key : logrt["/m/0190/s/xebiz/tux/^ULOG.[0-9]{6}$","_CAT:[0-9]+: ERROR",,,skip] (screenshot 1)
3. Write entries

Result:

Sometimes, the file is re-read, but I don't know why or how... (screenshot 3)

The log size is always increasing (screenshot 5) and the log directory last modification date tends to indicate that the log hasn't been recreated (screenshot 6).

these entries are indeed not actually from 08:00:53 (screenshot 4)

Agent logfile is full of this error :

tr: Invalid combination of options and Strings.tr: Invalid combination of options and Strings.Usage: tr [ [-c|-C] | -[c|C]ds | -[c|C]s | -ds | -s ] [-A] String1 String2       tr { -[c|C]d | -[c|C]s | -d | -s } [-A] String1usage: grep [-r] [-R] [-H] [-L] [-E|-F] [-c|-l|-q] [-insvxbhwyu] [-p[parasep]] -e pattern_list... [-f pattern_file...] [file...]usage: grep [-E|-F] [-c|-l|-q] [-insvxbhwyu] [-p[parasep]] [-e pattern_list...] -f pattern_file... [file...]usage: grep [-E|-F] [-c|-l|-q] [-insvxbhwyu] [-p[parasep]] pattern_list [file...]

Expected:
Old entries not re-read.
See attached patch file...