Why has GoogleBot started last Friday to do POST-requests on a page. I can see in the logfile (just an example, had about 10.000 entries over the weekend - the url in the log is changed):
66.249.79.55 - - [15/Jul/2019:08:34:53 +0000] "POST /Contact/ HTTP/1.1" 200 16730 "https://www.example.com/Contact/" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
66.249.79.55 - - [15/Jul/2019:08:35:06 +0000] "POST /Contact/ HTTP/1.1" 200 16730 "https://www.example.com/Contact/" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
66.249.79.55 - - [15/Jul/2019:08:35:18 +0000] "POST /Contact/ HTTP/1.1" 200 16730 "https://www.example.com/Contact/" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
66.249.79.55 - - [15/Jul/2019:08:35:20 +0000] "POST /Contact/ HTTP/1.1" 200 16730 "https://www.example.com/Contact/" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
66.249.79.55 - - [15/Jul/2019:08:35:34 +0000] "POST /Contact/ HTTP/1.1" 200 16731 "https://www.example.com/Contact/" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
66.249.79.55 - - [15/Jul/2019:08:35:45 +0000] "POST /Contact/ HTTP/1.1" 200 16730 "https://www.example.com/Contact/" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
66.249.79.55 - - [15/Jul/2019:08:35:46 +0000] "POST /Contact/ HTTP/1.1" 200 16730 "https://www.example.com/Contact/" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
66.249.79.55 - - [15/Jul/2019:08:36:00 +0000] "POST /Contact/ HTTP/1.1" 200 16730 "https://www.example.com/Contact/" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
66.249.79.55 - - [15/Jul/2019:08:36:10 +0000] "POST /Contact/ HTTP/1.1" 200 16730 "https://www.example.com/Contact/" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
Would setting the page to index/nofollow help in stopping this behaviour?
Funny side node: that page is using Google recaptcha V3, so in the google recaptcha stats I can see about 95% of bad requests (looks like they are from Googlebot itself).