@Balaram_Rudra I can replicate the use-case in-house with the latest SP16, but why aren't you using the forms add-on to leverage the forms features (and themes)? How are you applying the themes?OOTB very elementary Forms features are provided with AEM installation, and you're seeing this issue proba...

@fulongt37334138 I don't think it's supported with the OOTB options, but you can customize the component and leverage the methods such isKeyAnOptGroup[0] to identify an optgroup or option values. [0] - https://developer.adobe.com/experience-manager/reference-materials/6-5/forms/javadocs/index.html?c...

@Sb2512 Version control is not currently supported with Adaptive Forms. There is a feature pack request already logged with the product management team to enable AF's versioning as we have for AEM Pages- No ETA for now.Update: You can create Core Components based Adaptive Forms to enjoy the versioni...

@patrickpai  Did you update the Reader extension certificate with the latest as per the helpdoc- https://experienceleague.adobe.com/docs/experience-manager-65/forms/administrator-help/configure-acrobat-reader-dc-extensions/updating-expired-reader-extension-certificates.html ? This error msg seems to...

@Brian_Morris  Could you elaborate on the use-case? Are you referring to AEM Forms integration with Marketo? 

@Sb2512  Whenever new changes in an AF are pushed to a publish instance, ensure that the AF cache[0] is reset (value set to 0). You can add back the default value once done. Please check if that helps. Also, you need not update the page settings for any change in the AF on the publish instance; the ...

@nvundavalli  Although the official document mentions that CC minified JS better, you can change the minification with GCC following the below-mentioned steps[0] in AEM.    [0] - https://experienceleague.adobe.com/docs/experience-cloud-kcs/kbarticles/KA-16544.html?lang=en# 

@Srinivas_Opti  OOTB, AEM forms provides referrer filtering which can help prevent CSRF attacks. Here are more details - https://experienceleague.adobe.com/docs/experience-manager-65/forms/administrator-help/configure-user-management/preventing-csrf-attacks.html?lang=en#how-allowed-referers-work 

@StrawHatM23  AEM-AF-901-004 is the generic server-side exception code during submission, hence you see the error message (ie) “Encountered an internal error while submitting the form” in the client. To narrow down the issue, please share the error log msg for the attempt. If you have enabled the PO...

@Aditya-Singh  Subsequent requests will be queued until one of the 8 XMLForm service processes is released back to the pool. The incoming requests will bounce back/timeout in case none of the threads are available to process the request after a particular time period.