4.9 - anyone else having TinyMCE issues?

.

I just released GPP 1.5.4 which fixes this.

Thanks!

Cheers, Tom

??????????????????????
<span data-mce-type="bookmark" style="display: inline-block; width: 0px; overflow: hidden; line-height: 0;" class="mce_SELRES_start"></span>
??????????????????????

Always inputing this code when I in HTML editor write code for iFrame and aftere this i go back to visual mode.
Is this a bug or should I let that happen and ignore ?.

01. I wrote in HTML editor this:
<iframe src="***URL***"></iframe>

02. After i go back to visual editor and again go to HTML editor i find this:
<iframe src="***URL***"><span data-mce-type="bookmark" style="display: inline-block; width: 0px; overflow: hidden; line-height: 0;" class="mce_SELRES_start"></span></iframe>

Why?

Are you using Sections? Or is this happening in the regular editor?

Make sure you're all up to date (plugins + theme).

I write a clean blog post without sections and any plugins.

I have installed:
Wordpress - v4.9.8–cs_CZ - latest
GP - v2.0.2 - available v2.1.4
GPP - v1.6.2 - available v1.7.2 - Plugin v1.7.2 Compatibility with WordPress 4.9.8: Unknown???????

Akismet Anti-Spam - v4.0.3 - available v4.0.8
All-in-One WP Migration - v6.74 - available v6.77
Elementor v2.0.3 - available v2.2.5
Jetpack by WordPress.com v5.9 - available v6.6.1.
WooCommerce v3.3.4 - available v3.4.7
WooCommerce PayPal Express Checkout Gateway v1.5.1 - available v1.6.4
WooCommerce Services - v1.12.3 - available v1.16.1

I'm going to explore what's the best way to update GP and GPP and then update and test if the problem persists.
I have created a new thread "Best practice to install GPP and GPP"
If you want, you can help me out and advise on how best to do it.