Bold unicode characters appear doubled

/tellraw @p {"text":"∓","bold":true}

/**
 * Render a single line string at the current (posX,posY) and update posX
 */
private void renderStringAtPos(String p_78255_1_, boolean p_78255_2_)
{
	for (int var3 = 0; var3 < p_78255_1_.length(); ++var3)
	{
		char var4 = p_78255_1_.charAt(var3);
		int var5;
		int var6;

		if (var4 == 167 && var3 + 1 < p_78255_1_.length())
		{
			//...
		}
		else
		{
			//...
			
			// Changed this
			//float var12 = this.unicodeFlag ? 0.5F : 1.0F;
			float var12 = var4 == 0 || var5 == -1 || this.unicodeFlag ? 0.5F : 1.0F;
			boolean var7 = (var4 == 0 || var5 == -1 || this.unicodeFlag) && p_78255_2_;
			
			if (var7)
			{
				this.posX -= var12;
				this.posY -= var12;
			}

			float var8 = this.renderCharAtPos(var5, var4, this.italicStyle);

			if (var7)
			{
				this.posX += var12;
				this.posY += var12;
			}

			if (this.boldStyle)
			{
				this.posX += var12;

				if (var7)
				{
					this.posX -= var12;
					this.posY -= var12;
				}

				this.renderCharAtPos(var5, var4, this.italicStyle);
				this.posX -= var12;

				if (var7)
				{
					this.posX += var12;
					this.posY += var12;
				}

				++var8;
			}
			
			//...
		}
	}
}