The simple fix is to use classic version of Gmail. Go to gmail.com and look at the bottom right corner you should see a quick pop up message to access Gmail Classic version or try this link https://mail.google.com/mail/u/0/h/ This is for desktop version of Gmail where you access your gmail via browser like chrome or internet explorer. Does not work for App gmail, gmail app might have this feature as well, I don’t know haven’t take a look.
Basically I think the problem is slow connection or some kind of glitch on your browser or could also be the server side not necessary client side. In any case, that’s the quick fix if you’re using browser like Chrome or Internet Explorer, just access the classic version of gmail.
Now I have encountered some people asking me why I am still using yahoo mail? well, what’s the different with gmail? more reliable? – I don’t think so. It doesn’t matter if you use gmail or gmail or even outlook hotmail, it will have problem one day, the most important thing is make sure you have 2FA (second authorization “DescriptionMulti-factor authentication is an authentication method in which a computer user is granted access only after successfully presenting two or more pieces of evidence to an authentication mechanism: knowledge, possession, and inherence. Two-factor authentication is a type, or subset, of multi-factor authentication“) Make sure the email service you use have 2fa, and enable 2FA immediately preferrably SMS text or Google Authenticator code. Then you’re safe, nothing to worry about, unless you loose your phone or device that have these 2fa codes or sms text and your phone or device is not locked. You don’t need to worry about your password, you can even give it out, but hackers will not be able to login unless they have your phone or device that have the special code.