Attached Process flow. My process is getting stuck in Xor Gate.

For this and similar questions the best place to look for information is the Appian Documentation forum.appian.com/.../XOR_Node

In this section it is stated that "When multiple incoming flows are connected to the XOR gateway, it allows the first flow token through to an exclusive outgoing flow. Subsequent flow tokens wait for all incoming flows to arrive before executing the output flow decision. "

One common design practice is to have an empty script task before the or gate. When your logic dictates a loop back through send it to the script task. This way the or gate only has one input flow so is free to execute many times without the constraint detailed above.

For more information on this issue, please see:
forum.appian.com/.../Prevent_and_Recover_from_Common_Process_Problems