I'm using Survey Builder with Apex 5.0 and Oracle Database 12c but I'm having issues some apex public URL's. Sometimes browser shows a blank page and problem dissappears after some minutes / refreshing.
Here are both situations:
URL is of the type: http://myurl:8090/ords/f?p=100:Q::AABG:::code:TIDZPTATHREPCMNI
First load : BLANK PAGE



I tried refreshing but it continues returning a blank page. Then I tried after 20-30 minutes and there was the correct output. Here are some screenshots of same URL:
CORRECT OUTPUT:


Does anyone knows why this is happening?
Thanks,
Sergio
UPDATE: Here is the log of Tomcat:
When URL works:
- 10.0.4.25 - - [11/Jun/2015:16:29:18 +0200] "GET /ords/f?p=100:Q::AABG:::code:AADFMUYTGVPNNHFB HTTP/1.1" 200 85683
- 10.0.4.25 - - [11/Jun/2015:16:29:19 +0200] "POST /ords/wwv_flow.show HTTP/1.1" 200 41
When URL doesn't works:
- 10.0.4.25 - - [11/Jun/2015:16:33:35 +0200] "GET /ords/f?p=100:Q::AABG:::code:AAGUNNSOCQSAGPAK HTTP/1.1" 200 5
- 150.70.173.44 - - [11/Jun/2015:16:33:44 +0200] "GET /favicon.ico HTTP/1.1" 200 21630