Files in /var/spool/cups/tmp starting with "foomatic" aren't being deleted in RHEL 7.8 and RHEL 8

Issue

There are thousands of files in /var/spool/cups/tmp that aren't getting deleted:

ls -laR /var/spool/cups/tmp/
/var/spool/cups/tmp:
total 269400
drwxrwx--T 2 root lp 192512 Oct 14 17:45 .
drwx--x--- 3 root lp     17 Oct 14 17:45 ..
-rw------- 1 lp   lp  45011 Oct 14 15:02 foomatic-00lSTh
-rw------- 1 lp   lp  45250 Oct 14 15:34 foomatic-00W2JH
-rw------- 1 lp   lp  45199 Oct  9 04:38 foomatic-018RsK
-rw------- 1 lp   lp  44966 Oct  8 04:56 foomatic-01dP8I
-rw------- 1 lp   lp  44609 Oct 10 05:00 foomatic-01RcuQ
-rw------- 1 lp   lp  45279 Oct 14 15:01 foomatic-02Umm0
-rw------- 1 lp   lp  45104 Oct 13 04:00 foomatic-04Cm0r