How to make a gradient button for Yandex.Mail?

Question

Email

Suddenly Yandex.mail stopped displaying buttons with gradients

<a href="" style="display:block;
text-decoration:none;
text-align:center;
background:linear-gradient(180deg,#ffb900 0%,#ff8900 100%);
border-radius:3px;
padding-top:19px;
padding-right:36px;
padding-bottom:19px;
padding-left:36px;"
>

Gmail, Mail.ru, mail clients - display normally. The problem is in the application and the Yandex browser.
Are there any crutches / hacks to make a gradient button for all norms