Weblogic proxy module mod_wl_24.so 12.2.1.3 and 4 for apache having issue with input filter

My application has an apache with content generator module, connected to backend weblogic using mod_wl.

Was using mod_wl 12.1.3. I had an issue with that when backend weblogic was upgraded to 12.2.1.3. There was a delay of upto 30 seconds in some requests(with empty response body) when proxying requests. As per a post in oracle(https://support.oracle.com/knowledge/Middleware/2655604_1.html), updated mod_wl to 12.2.1.4 and the issue went away.

But it started another issue. I have a content processing module in apache and an input filter to copy the processed data. Once the new wl proxy module was applied, no content was forwarded. I see in logs that the input filter is not applied. So, the content read is 0. I tried old mod_wl and it started working again. Any input is much appreciated.