Apace weird caching?

[Strong]

I made mod_perl2 support for one dir. When i run a perl script from that
dir from a browser, it behaves weird: first time it does one thing, when
reloaded still that thing, again reloaded, may the same/may another
thing, and all the next reloads it does this another thing. - Why? If i
restart httpd, then all is repeated from the beginning. How to fix it?
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Best regards,
Strong.