Copy/Cut Hangs RDP connection for several seconds
## Local System Description
* Client (OS name and version): Kunbuntu 18.10
* Remmina version ( ```remmina --version``` ): ```1.3.5```
* Installation mean:
- [ ] Distribution package.
- [ ] PPA.
- [X] Snap.
- [ ] Flatpak.
- [ ] Compiled from sources.
- [ ] Other - detail:
* Desktop environment (GNOME, Unity, KDE, ..):
* Plugin:
- [X] RDP - freerdp version ( ```xfreerdp --version``` ): ```1.1.0-beta1```
- [ ] VNC
- [ ] SSH
- [ ] SFTP
- [ ] SPICE
- [ ] WWW
- [ ] EXEC
- [ ] Other (Please specify):
* Gtk Backend (Wayland, Xorg): Xorg
* Optional: include the output of the following commands at the end of this text:
- `remmina --full-version`
<!-- ( Paste after the `shell` line ) -->
```shell
ERROR: ld.so: object 'libesets_pac.so' from /etc/ld.so.preload cannot be preloaded (cannot open shared object file): ignored.
```
- `sudo lshw -C video`
<!-- ( Paste after the `shell` line ) -->
```shell
description: VGA compatible controller
product: Ellesmere [Radeon RX 470/480/570/570X/580/580X]
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 0
bus info: pci@0000:08:00.0
version: e7
width: 64 bits
clock: 33MHz
capabilities: pm pciexpress msi vga_controller bus_master cap_list rom
configuration: driver=amdgpu latency=0
resources: irq:72 memory:e0000000-efffffff memory:f0000000-f01fffff ioport:d000(size=256) memory:f7900000-f793ffff memory:c0000-dffff
```
- `uname -a`
<!-- ( Paste after the `shell` line ) -->
```shell
Linux [SNIP] 4.18.0-25-generic #26-Ubuntu SMP Mon Jun 24 09:32:08 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
```
## Remote System Description
* Server (OS name and version): Widows Server 2016, Windows Server 2012, Windows 10
## Problem Description
Whenever I copy or cut, the rdp connection seemingly hangs for a few seconds, no interaction is possible for a few seconds and the view does not change. This only occurs when using Remmina, and occurs whether clipboard syncing is on or off.
If I connect to any device via xfreerdp directly (ie. `xfreerdp /u:JohnDoe /p:Pwd123! /w:1366 /h:768 /v:192.168.1.100:3389
`), this issue does not occur.
**Edit**: Upon further review this seems isolated to Copy/cut within visual studio instances on remove devices. This also does not occur with xfreerdp by itself, which might indicate a Remmina-related problem? Though it is very odd that I can only replicate this by copying text from a VS instance on a remote device, and only with Remmina and not XFreeRDP...
### What is the expected correct behavior?
Copying should have no delay, and shouldn't hang VS
### Relevant logs and/or screenshots
No related log information
issue