tag added to MathML

Hi
Starnge thing happened a <p> tag is added when ever there’s a MathML formula.
The <p> tag is added to the MathML itself and to any text that is coming befor or after in the paragraph.
The original html code:
??, ????? ???, ???? ??? ????? ???? ????? ???? ???????? <math xmlns="https://www.w3.org/1998/Math/MathML" class="wrs_chemistry"><mstyle mathsize="18px"><mmultiscripts><mi mathvariant="normal">H</mi><mprescripts></mprescripts><mn>1</mn><mn>1</mn></mmultiscripts></mstyle></math> ???? ???? ???? 1 ???, ??? ???? ?-1 ??? ????? ???? ???? ???? ?????? ?? ?? ?????????? ?????? ?? ????, ???? ?? ???? 1 ??? ??? 1.01 ???, ??? ??????? ????? ????????.
Becomes:
<p>??, ????? ???, ???? ??? ????? ???? ????? ???? ????????</p><p><math xmlns="https://www.w3.org/1998/Math/MathML" class="wrs_chemistry"><mstyle mathsize="18px"><mmultiscripts><mi mathvariant="normal">H</mi><mprescripts></mprescripts><mn>1</mn><mn>1</mn></mmultiscripts></mstyle></math></p><p>, ???? ???? ???? 1 ???, ??? ???? ?-1 ??? ????? ???? ???? ???? ?????? ?? ?? ?????????? ?????? ?? ????, ???? ?? ???? 1 ??? ??? 1.01 ???, ??? ??????? ????? ????????.</p>

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