Tahir: No third party plugins installed, but I can deactivate it easily. I just turn it off and when I’m done editting I turn it on again.
Melanie: I checked with the other plugin (Revolution Slider) and there was no problem there, so I’m 100% possitive it’s the Contact7 Plugin
I just wanted to let you know in case someone is having the same issue. If you wan’t to check it out and test it to find what the problem is, I’ll be happy to give you the wp-admin login details
Thanks to both of you ๐