A way to sync shooting while rotating player.

Hello, in my game player rotation is done by 90 degrees per click, so when player is facing left and press down key, it will rotate to face down. Also player has an ability for shooting while rotation happens, and at this point I've got a problem with wrong bullet direction synchronization.
Here is some screenshots:

Spoiler

I guess this might happen because of rotation interpolation, but as you can see the difference is huge and I have no idea how to fix this.
Shooting code part:

Code (csharp):

1.  
2. void Update ()
3.     {
4.         if (Input.GetMouseButtonUp(0))
5.         {
6.                 if (isServer)
7.                     RpcShoot();
8.                 else
9.                     CmdShoot();
10.         }
11.     }
12.  
13.     [Command]
14.     void CmdShoot()
15.     {
16.         RpcShoot();
17.     }
18.  
19.     [ClientRpc]
20.     void RpcShoot()
21.     {
22.         Vector3 pos = thisT.position + thisT.up * bulletSpawnOffset;
23.         Quaternion rot = thisT.rotation;
24.         Rigidbody2D bulletObj = Instantiate(bullet, pos, rot) as Rigidbody2D;
25.         bulletObj.AddForce(bulletObj.transform.up * 350);
26.     }
27.  

Hope for your help!